Classifications

• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
  • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
  • G03F7/004—Photosensitive materials
  • G03F7/016—Diazonium salts or compounds
• • G—PHYSICS
  • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
  • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
  • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
  • G03C5/18—Diazo-type processes, e.g. thermal development, or agents therefor

Definitions

• Colloid layers sensitized by means 0 salts of chromic acid are not only unfit for being stored for some time, for even in the course of a few hours the said layers may under unfavorable atmospheric-conditions undergo so extensive alterations that it is no longer possible to obtain invariably good results by using them for-the above mentioned purposes. 7
• tanning action is here to be understood that action by which the solubil-- ity or the swelling u of colloids is diminished.
• a similar actlon to that of a bichromate can be produced by other oxidation agents for instance ammonium hypobromite, and likewise diazo compounds of great coupling capacity.
• stable diazo comounds as for instance orthoor para-hyroxyor amino-diazo compounds it has being ex 1928, Serial No. 298,1 26, and m Germany August 22, 1927.
• the diazo compounds in question may be incorporated into the colloid layer when it is b mg repared or by subsequentl plache a er in a bath prepared rom a so ution o the respective diazo compound, if reguired, with a stabilizer or. sensitizer adde thereto.
• the said diazo compounds may also be applied alone on a suitable base for instance paper, films, metal-foils or the him), then exposed to light under a correspondin original and finally pressed upon a colloi layer moistened with a solution of a chromate.
• Diazo compounds may be used with advantage instead of chromates in all reproducing processes where a tanning effect 1s to be producedon colloid la er by chromates reduced by the action of t e light.
• processes may be mentioned: Pi mentprinting, copper-deep rinting, photo ithography, phototypy, ge atine-printing, gum-v been washed. In certain cases' it is advan AND wmnnnrxamena, or, HALLE & co.
• AKTIENGESELLSGBAFT A
• Pigment paper is placed in a bath prepared with a solution, at 18 C. temperature, of 4; parts of hydrofluoborate of l-diazoldimethylaminobenzene in 100 parts of water and left therein until it is thoroughly moistened; the paper is then pressed upon a well nitrocellulose with a gelatine layer of a cleaned glass-plate and dried and, afterdrying, it is detached from the latter.
• the said diazo. compound may be obtained by diazotizing 1-amino-4;-dimethylaminobenzene in the presence of a hydrofluoboric-acid.
• the dried pigment paper is exposed to light under a negative, then placed together with a suitable piece of transfer paper in a 2 per cent solution of potassium bichromate, until the pigment paper becomes stretched, the pigment paper and transfer paper are then taken from the bath, pressed upon each other and the picture is developed by dissolving therefrom the gelatine which has not been exposed to light in water of about 40 C. temperature in the manner in which pigment-pictures are usually de veloped.
• 4-diazo-3-meth l--dimcthylanilinsulfate there may be use the cadmium salt of l-diazol-monoethylnaphthylamine or the diazo compound of para-aminodi'phenylamine.
• the picture can be developed by means of a wet small piece of wedding; after drying the developed picture it is fur ther re-printed by the usual method on a lithographic stone, zinc or aluminium and further treated.
• a photo-print film produced from suitable .de ree of hardness, such' as the known Ag a film, is placed in a bath prepared from 4 parts of thediazo'compound from v1-amino-2-oxy-3-naphthalenecarboxylic acid in 100 parts of water and a small quantity of ammonia, then drawn through acetic acid and by drying it at 2829 C. a' wrinkled grain is produced thereon.
• Upon the film so prepared a negative is copied, the film exposed to light and then placed for 2 minutes in a bath prepared from a 2% solution of potassium bichromate, whereupon it is thoroughly watered and dried.
• the further treatment and printing are operated in the usual manner.
• tanning action is to be understood that action by which the solubility and the swelling up of colloids are diminished under the influence of light.
• tanning agent ammonium hypobromite, etc., and likewise diazo compounds of great coupling capacity
• a diazo compound pressing it the layer sensitive to light, exposing it to light, treating it with a, solution of a chromate and developing it with water.
• the process of preparing pictures to be produced by tanning action consisting in applying a mixture of a diazo compound containing besides the diazogroup a basic group, an organic colloid, a igment and a stabilizer on a base placing t e object to be copied-on the layer sensitive to light, exposing it to light, treating it with' a solution of a chromate and developing it with water.
• the rocess of preparing pictures to be produced by tanningaction consisting in applying a mixture of a diazo compound containing besides the diazo group a basic group and a pigment on a base plac ng'tho object to be copied. on the layer sensitive to layer of an organic colloid, having been treated with a solution of a chromate and developing it with water.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
• Photosensitive Polymer And Photoresist Processing (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=6090230

Family Applications (1)

Country Status (4)

Cited By (7)

Families Citing this family (1)

• 0
  • NL NL25053D patent/NL25053C/xx active
• 1928
  • 1928-08-07 US US298126A patent/US1762033A/en not_active Expired - Lifetime
  • 1928-08-21 FR FR659749D patent/FR659749A/fr not_active Expired
  • 1928-08-22 GB GB24193/28A patent/GB296008A/en not_active Expired

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